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Marine natural gas storage cylinder dual-layer pipeline and manufacturing method thereof

A technology of double-layer pipes and production methods, which is applied in the directions of pipe supports, pipe protection, and protection of pipes through thermal insulation, etc., can solve the problems of unfavorable production, affecting normal use, and large workload of group pairs.

Inactive Publication Date: 2020-04-07
ZHANGJIAGANG CIMC SANCTUM CRYOGENIC EQUIP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, since there are many pipes below the highest liquid level, the welding and assembly workload is relatively large in the process of making stainless steel sleeves, which is not conducive to production and manufacturing. At the same time, due to deviations in the manufacturing process, stainless steel pipes There is segregation between it and the stainless steel casing, which affects the normal use in the later period

Method used

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  • Marine natural gas storage cylinder dual-layer pipeline and manufacturing method thereof
  • Marine natural gas storage cylinder dual-layer pipeline and manufacturing method thereof
  • Marine natural gas storage cylinder dual-layer pipeline and manufacturing method thereof

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Embodiment Construction

[0025] While the invention may readily be embodied in different forms, only some of these are shown in the drawings and will be described in detail in this specification, with the understanding that the specification should be considered as the These are exemplary illustrations of the principles of the invention and are not intended to limit the invention to what is described herein.

[0026] Thus, a feature indicated in this specification will be used to describe one of the features of an embodiment of the present invention, rather than implying that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes a number of features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly described. Thus, the illustrated combinations are not intended to be limiting unless otherwise stated.

[0027] In the...

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Abstract

The invention provides a marine natural gas storage cylinder dual-layer pipeline and a manufacturing method thereof. The marine natural gas storage cylinder dual-layer pipeline comprises an inner pipeand a sleeve sleeving the outer side of the inner pipe. The inner pipe comprises inner pipe straight parts and an inner pipe bent part. The sleeve comprises sleeve straight parts and a sleeve bent part. The sleeve bent part corresponds to the inner pipe bent part. The sleeve straight parts correspond to the inner pipe straight parts. The sleeve bent part comprises a plurality of beveling pipes which are welded and spliced to one another to form the sleeve bent part. The two sleeve straight parts are connected through the sleeve bent part. In the marine natural gas storage cylinder dual-layerpipeline and the manufacturing method thereof, weld joints of the natural gas storage cylinder dual-layer pipeline are annular weld joints formed after the beveling pipes are connected with each otherand the beveling pipes are connected with the sleeve straight parts. The length of the annular weld joints of the natural gas storage cylinder dual-layer pipeline is far smaller than the length of axial weld joints, and machining and manufacturing are facilitated.

Description

technical field [0001] The invention relates to the field of offshore platforms, in particular to a double-layer pipeline for a marine natural gas storage tank and a manufacturing method thereof. Background technique [0002] 4.1.3.8 of CCS Rules for Ships Powered by Natural Gas Fuel stipulates that “the pipeline between type C independent fuel tank and the first shut-off valve connected thereto is to be equivalent to the safety level of type C independent fuel tank.” [0003] In order to meet the requirements of the above technical specifications, it is necessary to design and install double-layer pipes. Firstly, the stainless steel pipes and stainless steel casings are bent with a uniform bending radius, and then the stainless steel casings are evenly cut and halved along the axial direction. After the welding of the pipes is completed, the half stainless steel sleeves are set in pairs with the stainless steel pipes, and then welded and spliced. Stainless steel sleeve spl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/18F16L7/00F16L59/14B23P15/00
CPCB23P15/00F16L7/00F16L9/18F16L59/14
Inventor 顾华刘东进范洪军甘少炜徐小艳尹红伟李晓晨
Owner ZHANGJIAGANG CIMC SANCTUM CRYOGENIC EQUIP
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